Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 11-science Answered

A weighing machine inside a stationary lift reads 50 kgf, when a man stands on it. What would happen to the weighing machine reading, if the lift is moving with constant velocity and constant acceleration?
Asked by Topperlearning User | 05 Jun, 2014, 05:00: PM
answered-by-expert Expert Answer

Apparent weight, W' = m(g + a), where a is the acceleration with which the lift moves upwards.

(1) When the lift moves with constant velocity, a = 0

Therefore, W' = m(g + 0) = mg = 50 kgf (weight remains the same)

 

(2) When the lift moves with the acceleration a in the upward direction, we have

W' = m (g + a)  50 kgf

Hence, the apparent weight will increase if the lift will move with acceleration a.

Answered by | 05 Jun, 2014, 07:00: PM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 11-science - Physics
A block of mass m is placed on a wedge as shown. Find difference between maximum and minimum (a(max) – a(min) ) horizontal rightward acceleration of wedge for which block remains at rest with respect to wedge. (A) 10g/9 (B) g/9 (C) g (D) None of these
question image
Asked by sahuaryanbro1.0 | 01 Jan, 2023, 10:17: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
find the velocity in rms
Asked by kashyspalbert91 | 11 Mar, 2022, 04:11: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
Assertion :pseudo force in an imaginary force which is recognized only by a non inertial observer to explain the physical situation according to Newton's laws Reason:pseudo force has no physical origin of the the basic interaction in nature, it doesn't exist as on action reaction .
Asked by Sainajena311 | 23 Oct, 2019, 09:39: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
What are contact forces? Give some examples of contact and non contact forces.
Asked by Topperlearning User | 05 Jun, 2014, 02:29: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
What is Normal Reaction? Explain with diagram.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
Give the formula of Spring Force and state the significance of the negative sign.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
A gardener is mowing a lawn by pushing and pulling the machine. In which condition is the normal force highest?
Asked by Topperlearning User | 05 Jun, 2014, 03:48: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
Consider a book lying on a table. Which forces are acting on the book?
Asked by Topperlearning User | 05 Jun, 2014, 03:54: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
What do you mean by equilibrium under concurrent forces?
Asked by Topperlearning User | 05 Jun, 2014, 03:55: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
Two forces of 5 kg and 12 kg are connected at the two end of the light inextensible string that passes over a frictionless pulley. Find the acceleration of the masses and the tension in the string, when the masses are released.
Asked by Topperlearning User | 05 Jun, 2014, 04:04: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×